:root {
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --color-dark: #1c1c1e;
    --color-light: #f5f5f7;
    --color-gray: #8e8e93;
    --bg-dark: #000;
    --bg-light: #fff;
    --accent: #0071e3;
  }
  
  body {
    margin: 0;
    font-family: var(--font-primary);
    background-color: var(--bg-light);
    color: var(--color-dark);
    line-height: 1.6;
    font-size: 17px;
  }
  
  h1, h2, h3 {
    font-weight: 600;
    margin: 0.4em 0;
  }
  
  a {
    color: var(--accent);
    text-decoration: none;
  }
  
  .container {
    max-width: 1024px;
    margin: auto;
    padding: 20px;
  }
  
  .hero {
    background: linear-gradient(to right, #fafafa, #f0f0f0);
    text-align: center;
    padding: 100px 20px;
  }
  
  .hero-title {
    font-size: 48px;
    font-weight: 700;
    color: #000;
  }
  
  .hero-subtitle {
    font-size: 24px;
    margin-top: 10px;
    color: var(--color-gray);
  }
  
  .btn-primary {
    display: inline-block;
    margin-top: 30px;
    padding: 14px 28px;
    background: var(--accent);
    color: white;
    font-weight: 600;
    border-radius: 10px;
    transition: background 0.3s;
  }
  
  .btn-primary:hover {
    background: #005bb5;
  }
  
  .section-title {
    font-size: 32px;
    margin-bottom: 20px;
    text-align: center;
  }
  
  .intro-text {
    text-align: center;
    font-size: 20px;
    max-width: 800px;
    margin: 0 auto 60px;
    color: #444;
  }
  
  .feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 80px;
  }
  
  .feature-item h3 {
    font-size: 20px;
    color: var(--accent);
  }
  
  .video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
  }
  
  .video-wrapper iframe {
    position: absolute;
    width: 100%;
    height: 100%;
    border: none;
  }
  
  .screenshot-gallery {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-top: 30px;
  }
  
  .screenshot-gallery img {
    width: 200px;
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
  }
  
  .store-badge {
    margin-top: 20px;
    width: 180px;
    height: auto;
  }
  
  .footer {
    background: #f2f2f2;
    padding: 40px 20px;
    text-align: center;
    font-size: 14px;
    color: #666;
  }
  
  .footer-nav a {
    margin: 0 10px;
    color: #444;
  }
  
  .footer-nav span {
    color: #999;
  }
  
  .footer-support {
    margin-bottom: 10px;
  }